Thermowell



FIG. 1 is a perspective view of a thermowell showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 perspective view of a second embodiment of a thermowell, it being understood that the broken lines are for illustrative purposes only and form no part of the claimed design; and,

FIG. 4 is a side view of the thermowell shown in FIG. 3. 

The ornamental design for a thermowell, as shown and described. 